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Brazilian Researchers Say Chinese-Made COVID-19 Vaccine is Effective

VOA News

   Brazilian researchers said Wednesday the coronavirus vaccine developed
   by Chinese drug maker Sinovac Biotech was found to be more than 50%
   effective in a late-stage clinical trial.

   But officials at the state-run research institute Butantan say they are
   withholding the results of the trial at Sinovac's request, raising
   issues once again about the lack of transparency involving the
   vaccine's development.

   Tests of the Sinovac vaccine, dubbed CoronaVac, were halted last month
   after an "adverse, serious event" involving a volunteer participant in
   late October.

   Sinovac is one of many drug makers around the world who have been
   racing to develop a safe and effective vaccine against COVID-19, which
   has killed more than 1.7 million people out of more than 78.7 million
   total confirmed infections, according to Johns Hopkins University's
   Coronavirus Resource Center.

   Latin America received its first doses of COVID-19 vaccine on
   Wednesday, with a shipment landing in Mexico City.

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